Home / 142,770.14-197,021.40-78,239.96

Finding the Fourth Proportional to 142,770.14, 197,021.40 and 78,239.96

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Solution

The fourth proportional to 142,770.14, 197,021.40 and 78,239.96 is: 107,970.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,770.14 : 197,021.40 = 78,239.96 : x
  2. Step 2: Convert to fraction form
    142,770.14/197,021.40 = 78,239.96/x
  3. Step 3: Cross multiply
    142,770.14x = 197,021.40 × 78,239.96
  4. Step 4: Simplify right side
    142,770.14x = 15,414,946,455.14
  5. Step 5: Solve for x
    x = 15,414,946,455.14/142,770.14
  6. Step 6: Final answer
    x = 107,970.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.